US8445715B2 - Method of synthesizing fenofibrate - Google Patents

Method of synthesizing fenofibrate Download PDF

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Publication number
US8445715B2
US8445715B2 US12/600,515 US60051508A US8445715B2 US 8445715 B2 US8445715 B2 US 8445715B2 US 60051508 A US60051508 A US 60051508A US 8445715 B2 US8445715 B2 US 8445715B2
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Prior art keywords
fenofibric acid
solvent
fenofibrate
isopropyl
reaction
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US12/600,515
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US20120065421A1 (en
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Beatrice Lucas
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Synkem
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Synkem
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00Preparation of carboxylic acid esters
    • C07C67/10Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with ester groups or with a carbon-halogen bond
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00Preparation of carboxylic acid esters
    • C07C67/10Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with ester groups or with a carbon-halogen bond
    • C07C67/11Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with ester groups or with a carbon-halogen bond being mineral ester groups
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00Drugs for disorders of the metabolism
    • A61P3/06Antihyperlipidemics
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C69/00Esters of carboxylic acids; Esters of carbonic or haloformic acids
    • C07C69/66Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety
    • C07C69/67Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety of saturated acids
    • C07C69/708Ethers
    • C07C69/712Ethers the hydroxy group of the ester being etherified with a hydroxy compound having the hydroxy group bound to a carbon atom of a six-membered aromatic ring

Definitions

  • the invention relates to a novel process for the synthesis of fenofibrate.
  • This compound is an isopropyl ester of fenofibric acid and various processes have been provided for its industrial manufacture.
  • fenofibrate is preferably obtained with a good yield by reaction of 4-chloro-4′-hydroxybenzophenone with isopropyl 2-bromo-2-methylpropanoate in the absence of solvent and in the presence of an alkaline agent, such as, in particular, potassium carbonate (EP 0 245 156 B1).
  • an alkaline agent such as, in particular, potassium carbonate
  • WO 02/062743 discloses a process for the preparation of fibrates similar to the preceding process but in which the phenol is reacted with an alkyl 2-bromo-2-methylpropionate in the presence of potassium bicarbonate and in a solvent chosen from C 1 -C 4 ketones and alcohols.
  • a solvent chosen from C 1 -C 4 ketones and alcohols chosen from C 1 -C 4 ketones and alcohols.
  • the only example described in this document relates to fenofibrate and the solvent used is isopropanol.
  • the reaction time is much greater than in the case of the solvent-free process.
  • the document EP 0 002 151 discloses a different process according to which the methyl ester of 2-methyl-2-phenoxypropanoic acid is reacted with 4-chlorobenzoyl chloride or 4-chlorobenzoic anhydride in a halogenated solvent in the presence of a Lewis acid, such as boron trifluoride (Friedel-Crafts reaction).
  • a Lewis acid such as boron trifluoride
  • the latter method exhibits the advantage of using inexpensive reactants and thus of producing fenofibrate with an advantageous material cost.
  • the industrial implementation of the esterification stage requires large amounts of sulfuric acid in order to obtain good reaction kinetics, which results in frequent processing difficulties.
  • the process for the preparation of fenofibrate according to the invention is thus characterized in that it consists in reacting, in a solvent composed of a mixture of dimethyl sulfoxide and of a C 2 -C 4 alkyl acetate, a metal salt of fenofibric acid with an isopropyl halide.
  • the present invention relates to a novel process for producing fenofibrate starting from fenofibric acid, in which the esterification reaction is carried out using an alkyl halide and is performed in a specifically chosen solvent, according to the following reaction scheme:
  • a general embodiment of the invention consists in reacting fenofibric acid with an inorganic base in a solvent system composed of a mixture of dimethyl sulfoxide and of a C 2 -C 4 alkyl acetate, so as to obtain a metal salt of fenofibric acid, such as, for example, a potassium or sodium salt, and then this salt is reacted with an isopropyl halide, at a temperature close to the reflux temperature of the reaction mixture at atmospheric pressure, in order to obtain fenofibrate in solution in the mixture.
  • a metal salt of fenofibric acid such as, for example, a potassium or sodium salt
  • the novelty of the present invention lies in the choice of the solvent system used for carrying out the reaction represented by the preceding reaction scheme.
  • dimethyl sulfoxide and of C 2 -C 4 alkyl acetate used in the context of the present invention can vary within wide limits.
  • a mixture of DMSO and of alkyl acetate so that the ratio of the total weight of solvent to the weight of the fenofibric acid is comprised between 0.2 and 3 and more preferably comprised between 0.4 and 2.
  • the isopropyl halide is preferably isopropyl bromide (also known as 2-bromopropane).
  • the metal salt of fenofibric acid is generally prepared by reaction (preferably carried out in the reaction medium) between fenofibric acid and a base, preferably an inorganic base.
  • fenofibric acid is salified with potassium carbonate and the potassium salt obtained is reacted with isopropyl bromide in the same reaction medium.
  • a mixture composed of fenofibric acid and of the solvent system is first prepared, followed by addition of a stoichiometric amount of a basic inorganic component capable of forming a salt with fenofibric acid.
  • a stoichiometric amount of a basic inorganic component capable of forming a salt with fenofibric acid Use is more particularly made of potassium carbonate in order to obtain the potassium salt of fenofibric acid.
  • An amount of an isopropyl halide (preferably 2-bromopropane) slightly greater than stoichiometric is subsequently added to the reaction mixture and the resulting mixture is brought to gentle reflux for 2 to 8 hours.
  • the insoluble inorganic salts are removed by filtration and the solvent of the reaction is also removed and replaced by the crystallization solvent of fenofibrate. After cooling, the crystallized fenofibrate is isolated by filtration on a filtering device and dried.
  • This process can be adapted to an industrial reactor (stainless or enameled steel) which makes possible the production of batches of approximately 1000 kg with 4000 l reactors under reaction time and capacity conditions compatible with an excellent productive output.
  • the process according to the invention allows direct access to a product in agreement with the quality standards of Pharmacopoeia without the need for purification by recrystallization.
  • These various aspects are also highly advantageous from the viewpoint of the protection of the environment since the by-products of the reaction are limited in amount and for the most part can be recycled.
  • the entire process uses a very small amount of water and does not produce any wastes in the form of saline aqueous solutions.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Diabetes (AREA)
  • Hematology (AREA)
  • Obesity (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
US12/600,515 2007-07-02 2008-07-02 Method of synthesizing fenofibrate Expired - Fee Related US8445715B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0756220A FR2918366B1 (fr) 2007-07-02 2007-07-02 Nouveau procede de preparation du fenofibrate
FR0756220 2007-07-02
PCT/EP2008/058511 WO2009004029A1 (fr) 2007-07-02 2008-07-02 Nouveau procede de synthese du fenofibrate

Publications (2)

Publication Number Publication Date
US20120065421A1 US20120065421A1 (en) 2012-03-15
US8445715B2 true US8445715B2 (en) 2013-05-21

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US12/600,515 Expired - Fee Related US8445715B2 (en) 2007-07-02 2008-07-02 Method of synthesizing fenofibrate

Country Status (8)

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US (1) US8445715B2 (it)
EP (1) EP2170801B1 (it)
JP (1) JP5442603B2 (it)
KR (1) KR20100036231A (it)
CA (1) CA2690869A1 (it)
EA (1) EA016448B1 (it)
FR (1) FR2918366B1 (it)
WO (1) WO2009004029A1 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11427528B2 (en) 2016-07-29 2022-08-30 Hangzhou Solipharma Co., Ltd. Fenofibrate crystalline form and manufacturing method thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103373921B (zh) * 2012-04-26 2016-08-10 浙江海正药业股份有限公司 4-((取代苯基)二氟甲基)苯氧基羧酸衍生物及其制备方法和医药用途
CN104276950B (zh) * 2014-09-19 2016-04-20 徐州工业职业技术学院 一种智能控温、远程监控制备非诺贝特的方法
CN108821973B (zh) * 2018-08-14 2021-04-06 徐州工业职业技术学院 一种清洁生产普鲁脂芬的方法
KR102829625B1 (ko) * 2022-03-29 2025-07-04 한국바이오켐제약 주식회사 페노피브릭산의 정제방법 및 이에 의해 제조된 페노피브레이트

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072705A (en) 1975-02-12 1978-02-07 Orchimed S.A. Phenylmethylphenoxy propionic acid esters
EP0126361A1 (de) 1983-05-20 1984-11-28 Bayer Ag Optisch aktive Propionsäure-Derivate
US20040073058A1 (en) 2001-02-02 2004-04-15 Giuseppe Guazzi Process for the preparation of fibrates
US20040132995A1 (en) * 2002-05-03 2004-07-08 Orchid Chemicals & Pharmaceuticals, Ltd. Process for the preparation of cephalosporins

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59225143A (ja) * 1983-06-06 1984-12-18 Kaken Pharmaceut Co Ltd ビフエニリルプロピオン酸誘導体およびその製造法
JPS63104939A (ja) * 1986-10-20 1988-05-10 Kiyuushin Seiyaku Kk 新規カプロン酸誘導体
JPH03188044A (ja) * 1989-12-18 1991-08-16 Tousoo Yuki Kagaku Kk アシルオキシ脂肪族炭化水素の製造方法
JPH072736A (ja) * 1993-06-16 1995-01-06 Dainippon Ink & Chem Inc 二塩基酸エステルの製造方法
JP5260826B2 (ja) * 2005-12-12 2013-08-14 東ソー株式会社 高純度含フッ素(メタ)アクリル酸エステルの製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072705A (en) 1975-02-12 1978-02-07 Orchimed S.A. Phenylmethylphenoxy propionic acid esters
EP0126361A1 (de) 1983-05-20 1984-11-28 Bayer Ag Optisch aktive Propionsäure-Derivate
US20040073058A1 (en) 2001-02-02 2004-04-15 Giuseppe Guazzi Process for the preparation of fibrates
US20040132995A1 (en) * 2002-05-03 2004-07-08 Orchid Chemicals & Pharmaceuticals, Ltd. Process for the preparation of cephalosporins

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Boros et al "Preparation of New 2,3-diphenylpropenoic Acid Esters-Good Yields Even for the More Hindered Z Isomers", Molecules, vol. 9, 2004, pp. 256-263.
http://en.wikipedia.org/wiki/Protic-solvent (Apr. 2012). *
http://www.chemicalland21.com/industrialchem/solalc/ISOPROPYL%20ACETATE.htm (Apr. 2012). *
Treu et al. (J. Heterocyclic Chem., 2002, 39, 1283). *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11427528B2 (en) 2016-07-29 2022-08-30 Hangzhou Solipharma Co., Ltd. Fenofibrate crystalline form and manufacturing method thereof

Also Published As

Publication number Publication date
JP2010531852A (ja) 2010-09-30
EP2170801A1 (fr) 2010-04-07
KR20100036231A (ko) 2010-04-07
CA2690869A1 (fr) 2009-01-08
EA201070078A1 (ru) 2010-06-30
FR2918366A1 (fr) 2009-01-09
JP5442603B2 (ja) 2014-03-12
EP2170801B1 (fr) 2014-03-26
US20120065421A1 (en) 2012-03-15
EA016448B1 (ru) 2012-05-30
WO2009004029A1 (fr) 2009-01-08
FR2918366B1 (fr) 2009-10-23

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